You know, there was a woman in this part of the state who used to knit dog-fur sweaters. She usually used the undercoat from golden retrievers, as I recall, but it looks like Leonberger undercoat would spin quite nicely, too!

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"We are--each of us--dying; it's how we live in the meantime that makes the difference."

"It's not what you gather, but what you scatter that tells what kind of life you have lived!"

"Be kinder than necessary, for everyone you meet is fighting some kind of battle."

Breeze, your boy is a very handsome fellow, in coat or not. Is the undercoat easy to strip out ? With my shelties, if they have a soft outer coat it is easy, but if they have the correct harsh outer coat sometimes the undercoat lifts just off the surface of the skin and sticks there, quite hard to groom out, and if you make the fatal mistake of bathing them before getting out any loose undercoat it just forms a matt. Been there, done that , it took hours to finish the job.
Cattle Dogs on the other hand can literally drop the whole undercoat overnight, which our Cuddles did the night before the Royal(biggest show in the Southern hemisphere) She still placed 5th out of 10 but what rotten timing!
I reckon Archer will be feeling wonderful after this groom.